When I open the game to play level one it closes the app. Why?

I have downloaded the game several times now, and every time I click on the level to play it closes the game. It then brings me back to my iPad home page. My iOS is upgraded enough, and I have enough room. Why is this happening?

I have downloaded the game several times now, and every time I click on the level to play it closes the game. It then brings me back to my iPad home page. My iOS is upgraded enough, and I have enough room. Why is this happening?